Rotary disk valve



NOV. 24, 1936. 3, PRATT, ET AL 2,061,716

ROTARY DISK VALVE Filed Mrh 27, 1953 5 Sheets-Sheet 1 Q glint/5211414- Nov. 24, 1936. B. .PRATT El AL 2,061,716

' BUTABY DISK VALVE Fil ed March 27, 1953 5 sheets-sheet 2 z: y m gm;

Nov.24, 1936. f E AL 2,061,716

ROTARY DI SK VALVE Filed March 27, 1933 5 Sheets-Sheet 3 Nov. 24, 1936.

BL PRATT ET AL ROTARY DIVSK VALVE Filed March 27, 1933 5 SheetsSheet 4 Nov. 24, 1936. PRATT ET AL 2,061,716

ROTARY DISK VALVE Filed March 27, 1933 5 Sheets-Sheet 5 It"? v ml lm:

wi; 3 y! Patented Nov. 24, 1936 NT OFFICE tiilfilldlt no'rv rsu vvh Best tt and George F. einrcich, iDhicago, ll l assignors, by mesne amients, to The tor Gas valve For, a corporation of llllinois l bIlieation 3 tDla.

Our present invention relates to a rotary disk valve, and more particularly to a valve of this type which is especially adapted for use to control theflow of gas to the burners of a gas range.

Ranges of the latest types are designed to have a smooth paneled appearanceand, to this end, the wall or outer casing of the range encloses the gas burner valves, only the operating handies of thevalves being permitted to extend from the casing. In some instances, stoves of this type are so constructed that when the burners are not in use, the panels may be shifted to enclose even the operating handles of the burners. In any event, the positioning of the valve within the casing of the range subjects the valve to the heat also confined within the enclosed casing and causes the lubricant with which the valve is supplied to burn out or become gummy within a very short time. When the lubricant has burned out, the valve becomes seized to its seat and when an attempt is made to operate the valve, the haneliminate the necessity of extremely accurate grinding and thereby make the manufacture of such valves economicahthe lubricant with which the valve and its seat are supplied is relied upon to maintain the seal between the valve and seat. Therefore, when the lubricant is burned out, the seal between the valve and its seat is destroyed and the valve becomes inedective.

An important'object of the present invention is to provide a valve structure for use on gas ranges which will be operative regardless of the high temperature to which it is subjected.

Another object of the invention is to provide a valve structure which will operate without the necessity of any lubricant other than that inherent in the material of which the valve structure is formed and which valvestructure may be readily and economically manufactured, partlcu larly since no fine grinding operations be necessary to obtain a seal between the valve and It ch 2r, ces, sen-n11 no. statue (or. err-ac) of gas to the individual burners of a duplex 1o burner aswell as to both of the individual burners. This object also comprehends the provision of a valve which will permit the broiler and oven burners to be separately controlled and also controlled together.

We provide a valve having the valve element and valve body thereof formed of a suitable metal containing graphite or some similar lubricating substance.- A valve formed of such material is self-lubricating even in the presence of extreme 2g heat and no other lubricant need be provided to insure proper operation. Since the valve ele-' ment is in dish form, the seat face of the valve body may be flat and both the valve element and the seat face of the valve body need only be ground fiat to'insure a proper seal between the two. The lubricant inherent in the cast iron also assists in maintaining the seal between the valve elementand the valve body.

In the drawings, wherein like numerals refer so to similar parts throughout the several views,

Figure l is a plan view of a valve constructed in accordance with our invention. Figure 2 is a side elevation ofthe valve.

Figure 3 is a horizontal sectional view taken on thellne of Figure 2.

Figure 4 is a vertical transverse sectional view taken on the line lll of Figure 2.

Figure 5 is an elevation of the face of a valve disk which may be used with our invention.

Figure 6 is an elevation of the face of another form of valve disk which may be used with the invention.

Figure 7 is a front elevation of a modified form of valve body, with the valve dish removed.

Figure 8 is a longitudinal verticalsectional view or the valve of Figure 'l, with the dish valve applied thereto.

Figure 9 is a longitudinal vertical sectional view of a slightly Yil form of the valve struc- 5b ture shown in Figure 8.

Figure 10 is a side elevation of a modified form of valve.

Figure i1 is an end elevation of the valve shown in Fe iii.

I2-I2 of Figure 11.

Figure 13 is a front elevation of the valve disk used with the device of Figure 10.

Figure 14 is a sectional view taken on the line I4--I4 of Figure 10 and showing the seat face of the valve body, the flow groove of the disk valve being shown thereon in dotted lines.

Figure 15 is a side elevation of another modification of our valve.

Figure 16 is an end elevation of the valve shown in Figure 15.

Figure 17 is a sectional view taken on the line I'I-I'I of Figure 16.

Figure 18 is a sectional view taken on the line I8--I8 of Figure 16.

Figure 19 is an elevation of the valve disk used in the valve of Figure 15.

Figure 20 is a sectional view taken on the line 20-40 of Figure 17.

Figure 21 is a plan elevation of another form of our invention.

Figure 22 is a side elevation of the valve of Figure 21.

Figure 23 is a sectional view taken on the line 2323 of Figure 21.

Figure 24' is a vertical cross-sectional view through a range, showing still another form of our invention in side elevation.

Figure'fl5 is a sectional view taken on the line 25-25 of Figure 24, portions being shown in front elevation.

Figure 26 is a central vertical sectional view showing another type of operating handle included in our invention.

Figure 2'7 is a front elevation of the handle used with the device of Figure 26.

In Figures 1 to 4, inclusive, of the drawings, the numeral I designates a valve body having a valve disk I I seated against one face I2 thereof. The valve body I0 is provided with a threaded extension I3 having a bore I4 therethrough, ex-

tension I3 being adapted to be connected to the.

gas supply manifold of the gas range. An extended portion I also having a bore therethrough designated by the numeral I 6 is intended to be connected to a pipe leading to the gas burner of the range. The bore I4 of the inlet extension I3 of the valve body and the bore I6 of the outlet extension I5 are angled as best shown in Figures 3 and 4 to open to the seat face I2 of the valve body.

The valve disk I I is rotatably mounted upon the valve body I0 and against the seat face I2 of the latter upon a pin I! which extends through aligned axial bores in the disk and body. The aligned axial bores of the valve body and valve disk may be counter-bored as shown at IT in Figure 4 to reduce the contacting area of the parts I0 and I I. The pin I1 is provided with a head I8 as shown in Figure 4, the headed portion I8 fitting in an enlargement of the outer end of the axial bore through the valve disk. A spring I9 surrounds the opposite end of the pin II, the inner end of the spring bearing against the valve body and the outer end contacting with a washer 20 held upon the pin I1 by a looking or cotter pin as shown. The spring I9 thereby serves to hold the valve disk tightly seated upon the valve body.

Thevalve disk I I is rotated with respect to the valve body III by means of a handle 2I which is Figure 12 is a sectional view taken on the line from the outer face of the valve disk II extends. It will be understood that swinging movement of the handle 2i on its pivot 22 will cause the valve disk II to be rotated with respect to the valve body Iii. As is shown in Figure 2, the valve handle 2i may operate in a slot 25 in the front plate 26 of the range, the ends of the slot thereby serving as stops for the valve handle.

The valve disk II is provided with a groove 21! in the face 28 thereof which contacts with the seat face I2 of the valve body I 0. This groove is preferably arcuate and may be tapered longitudinally in cross-section as shown in Figures 1 to 5, inclusive, or may he stepped as shown at 27' in Figure 6. In either event, the groove in the valve disk is adapted, upon rotation of the disk, to bridge the ends of the supply and delivery ports i4 and I6, respectively, which terminate at the seat face I2 of the valve body.

In operation, if a disk valve having the tapered groove 2'! shown in Figure 5 is used, it will be observed that when the reduced forward end 25 of the groove is brought into alignment, by rotation of the valve disk, with the infeed port I4, a limited amount of gas will flow from the infeed port I4, through the groove 21 and to the gas burner through the port or bore I 6. Further rotation of the valve disk will move a more "greatly enlarged portion of the groove 21 opposite the infeed port I4, thereby increasing the flow of gas to the burner.

If a valve disk II having the stepped form of groove 21' shown in Figure 6 is used with the valve body, rotation of the disk II to bring the advanced and shallow portion 30 of the groove 21' opposite the infeed port I4 will permit 9. limited amount of gas to flow to the burner. As rotation of the valve disk is continued to bring the wider and deeper groove 3| opposite the infeed port I4, the flow of gas will be increased:

In the forms of our device shown in Figures '7, B and 9, the valve body 35, valve disk 36 and operating shaft 31 are axially aligned. In this construction, the valve body is providedwith an inlet bore 38 and an outlet bore extending through extensions of the valve body to the seat face 40 thereof.

In the form shown in Figure 8 the valve disk 36 is rotatably mounted against the valve body upon the operating shaft 31 the shaft extending through aligned bores in the valve disk and valve body. The bore 4I extending through the valve disk is provided at its outer end with a socketed portion 42 in which a rounded beveled shoulder 43 on the operating shaft"3'I seats. The inner end of the operating shaft 31 is surrounded by a spring 44 having its inner end bearing upon a washer to hold the latter against thevalve body and its outer end bearing'upon a washer held in place at the extreme outer end of the shaft by a screw or the like 45. By this arrangement, the valve disk is held tightly seated against the valve body regardless of slight misalignments in the structure.

The valve disk 36 is caused to rotate with the operating handle 31 by reason of a key 46 upon the operating shaft which engages in a slot 41 in the bore M of the valve disk. In order to limit the rotation of the shaft 31 with respect to the valve body 35, an arcuate stop member 48 is seated in an enlarged portion 49 of the axial bore extending through the valve body. The stop member 48 is provided witha lug 50 which seats in a pocket in one sidepf the enlarged portion 49 of the bore, thereby holding the stop member 48 against rotation. The key 46 upon the shaft 31 is of sufll- 7 cient length to extend into the enlarged portion 49 of the bore through the valve body so that rotation of the operating shaft 31 will be limited by contact of the key 46 against the respective ends of the stop member 48,

The form of the invention shown in Figure 9 is identical with that shown in Figure 8 except that the spring .44 which holds the valve disk against the valve body is positioned between the valve disk 36* and a collar keyed to the operating shaft 31'. The outer endoi the spring 44 bears against the collar 5| while its inner end is seated in a counter-bore 52 concentric with the bore ii extending through the valve disk 36.

The valve disks shown in Figures 8 and 9' may be similar in form to either of the valve disks illustrated in Figures 5 and t, that is to say, they 1am have either a groove tapered in cross-section as shown at 2i or a stepped groove as shown at it. However the counter-bores ii' would pref- Referring to Figure 14, the operation of the valve is as follows: when the valve disk ii is turned in a clockwise direction with respect to Figure 14, the extreme upper end it of the large groove it in the valve disk will come into communication with the gas infeed port 64 at the same moment that the extreme outer end it of A very slight continued rotation of the valve disk erably not be provided on the valve disks used in the form of invention shown in Figures 8 to 9.

operating handle it is provided upon the I operating shaft ti and the operation of the valve till disks whereby the flow of gas will be controlled will be obvious from the description given in connection with Figures 1 to 6 inclusive. I

a ferringto the device shown in Figures 10 to it, inclus ve, the neral tt designates the valve body an the disk valve is indicated by the numeral ti. e valve body tt is provided with a threaded extension ti having a bore therethrough P which opens to the seat face tt of the valve body port on the seat face tt. The extension tt is adapted to a l nunicate with the small burner of a duplex burner not shown while the extension tt communicates with the larger burner of the duplex burner.

e disk valve ti is rotatably ounted upon the valve body ti in the an inner described in connection with Figure 9 a coil spring tt being provided K between the outer face of the valve disk and a til collar on the valve operating shaft it to hold the valve disk closely "-11 against the seat face of the valve body. However the valve operating shaft ltis provided at its inner end with a disk ii which is fixed to the inner end of the shaft it by means of a set screw it. The disk ii is provided on itsinner face with a radially extending pro- .iectionit which is apted to cooperate with indentations it on the valve body as hereinafter described.

The disk valve ti has an arcuate groove it in its face it which groove is relatively large in cross-section. A groove ll of smaller cross-section opens from the groove it and extends across and about the face it as shown in Figure 13. Fie it shows in dotted line the grooves it and ill-of the valve disk as they appear when the valve disk is operatively mounted upon the seat face tt of the valve body and with the gasinfeed bore tilout of counication with the grooves it and if this being the position of the valve disk ti when the valve is in entirely closed position and with no gas flowing to either burner of the duplex burner.

duplex burner.

ti will permit full flow of gas to the bore t'l leading to the small burner and will increase the flow to the port tt leading to the large burner. It will be obvious that the further rotation of the valve disk will entirely open the flow of gas to the large port tt without increasing the flow to the small port ti.

. The disk ti may be turned sumciently far in a clockwise direction with reference to Figure 14 to have the lower end it of the large groove it move entirely past and out of communication with the port tt to the larger burner, but gas will still flow to the port ti of the small burner through the larger groove it and then through the smaller groove ll. It will be understood from the above that the flow of gas may be directed to both burners simultaneously onto the small burner alone.

The indentation it may be so positioned upon the valve body'that the projection it on the disk ii of the operating shaft it will move intothis indentation when gas is flowing to both burners, with the how of-gas through the port tt at its greatest volume. An arcuate stop member ti may be positioned in the valve body in the manner described in connection with the stop member it of Figure 7 and a key ti on the shaft it will engage against the opposite ends of the member ti to indicate when the valve disk ti is in its alternate extreme positions. In one extreme position, as shown in Figure 14, the flow of gas to both burners is entirely shut-off when the key ,tf contacts with one end of the stop member ti.

When the key ti contacts with the opposite end of the stop member ti, gas will only how to the small bore ti leading to the smaller burner of the In Figures l5to 20, inclusive, a three-way type of valve is illustrated, this valve being particularly adapted for use in connection with ovens having one'burner for broiling and a separate burner for baking. In these figures, the numeral lit indicates the valve body and the disk valve is designated by the numeral ii. The valve body it is provided with an extension if which is provided with a bore it opening to a port it in the seat face it of the valve body. Connections may be made to the broiling burner and the baking -burner. respectively, from threaded sockets it and it in the valve body. The socket tt opens to the seat face it of the valve body through a port ti and the socket tll opens to the seat facethrough a port it, these ports preferably being positioned diametrically opposite each other upon the valve body as shown in the drawings. I

The valve disk ti is mounted for rotation with respect to the valve biidy by an arrangement substantially identical with that described in connection with Figure 9. However, the valve disk is provided with one arcuate groove itt. The

groove itt is of insumcient length to be simultaneously aligned with the infeed port t l and the ports ti and it leading to the separate burners. When the valve disk ti is turned to closed position, the groove itt thereof will be in the position shown in dotted lines in Figure 16 and will not communicate with either of the ports leading to the burners. Rotation of the rotary disk in either direction will place the groove I in communication with the port 98 or the port 99, the degree of rotation in either direction determining the amount of gas flowing through the groove Iilli and outflow port with which it communicates.

Figures 21 to 27 illustrate various types of operating means which may be used with any of the types of valve disks illustrated in the other figures. In this connection, it will be understood that any of the operating arrangements described herein may be used on any of the combinations of valve bodies and valve disks heretofore described.

Figures 21 to 23, inclusive, illustrate an operating handle III! which is adapted to be moved in a straight line, by push-and-pull movement, to operate a valve. As is illustrated in these figures, the valve handle H0 is slidably mounted in a bore III of an extended portion II2 of the valve body II3. A slot Ill opens from the bore III to the exterior of the extended portion I I2 and a pin H5 carried by the slide rod III] extends through this slot and has its outer end positioned between two spaced projections II6 projecting from the periphery of the disk valve I I1.

Ahandle I I8 is provided upon the slide rod III] and reciprocating movement of the handle H8 will, through the connections described above, rotate the valve disk II! to the desired position. The limit of movement of the valve disk will be determined by contact of the pin I I5 with the op.- posite ends of the slot 4. The wall of the stove is indicated in these figures by the numeral I I9.

Figures 24 and 25 illustrate an operating device which comprises an operating handle or knob I25 which is of arcuate form and adapted to be operated by brushing or pushing contact, the handle I25 being provided with projections I26 on its periphery to permit it to be turned by such contact. The matter of connecting the handle I25 with the valve will be obvious from Figures 24 and 25 and the description heretofore set'forth. A portion of the periphery of the handle I25 projects through the wall I21 of the range, so that the handle may be turned to the desired position. A portion of the handle may be cut away, as shown at I28, from the portion of the handle which is moved downward in opening movement of the handle. The effect of this cut-away portion is to reduce the weight of the handle on this portion of the handle, so that the handle will be substantially balanced when moving toward open position, thereby preventing the handle from dropping downwardly to open position.

The handle described above is particularly adapted for use in a range in which the handles are entirely covered when the stove is not in use. Figure 24 illustrates the manner in which the cover -'plate I29 of the range may be placed over the operating handle to entirely enclose the same.

In Figures 26 and 2'7, a graduated dial I35 is fixed to the outer end of the operating shaft I36 .of the valve. The handle I31 of the dial is preferably knurled as shown and graduations are provided upon a skirt I38 to indicate the degree of gas flowing through the valve, these graduated markings cooperating with markings upon the front panel I39 of the range.

It will be noted that each of the valve members or disks described herein is provided with a substantially arcuate groove which is also of longitudinally tapered form, that is, the portion of the groove which first moves into alignment with a port in the valve body is of smaller size, in crosssection, than the portion which may subsequently move into alignment with the port.

Both the valve element and valve body of our invention are formed of a material such as cast iron, which is self-lubricating because of the feet that it contains graphite. A valve formed of such material, and constructed as described above, needs no added lubricant to maintain its seal and can therefore be used in the presence of heat without the possibility of seizing. The valve structure may, of course, be formed of other materials having self-lubricating properties.

It will be obvious that the valve structures of our invention may be readily and economically manufactured, since no critical grinding operations are involved in their production in order to provide a proper seal.

It will be understood that the invention is not limited to the details of construction shown in the drawings and described in the specification and that the examples of the use of the various forms of the device which have been given do not include all of the uses of which the device is capable; also, that the phraseology employed in the specification is for the purpose of description and not of limitation.

We claim:

1. The combination with a valve device comprising a valve body, one face of which forms a valve seat, a shaft rotatable in the valve body and extending through the seat face thereof, and a valve member provided with a bore through which the shaft extends and positioned against the seat face of the valve body, of means to limit the turning movement of said shaft comprising a key on said shaft extending into a slot in the valve disk bore and into a counter-bore in the seat face of the valve body, and an arcuate member fixed in said counter-bore, said key being adapted to contact with the opposite ends of said arcuate member to limit turning movement of the shaft.

2. A valve device for gas ranges comprising a valve body one face of which forms a valve seat. a valve member rotatably mounted upon said face, said valve body having a supply passage and a plurality of delivery passages opening to the seat face thereof, and the valve having in its seat face an arcuate groove of relatively large cross section adapted to be aligned with one delivery passage, and a. groove of relatively small cross section, the smaller groove including an arcuate portion in circumferential alignment with the larger groove and adapted to be aligned with the other delivery passage, and an off-set portion communicating with the larger groove and out of alignment with all of the passages so that upon rotation of the valve member flow may occur to both delivery passages or only to the delivery passage with which the smaller groove is adapted to be aligned.

3. The combination of a valve device comprising a valve body element, a disk like valve element rotatable with respect to the valve body, said elements including seat faces and rear faces, their seat faces having passages therein adapted to be aligned by rotation of the valve disk element, of means to rotate the valve disk element with respect to the valve body element comprising a shaft rotatable and axially slidable in the valve body element and on which the valve disk ,oewie disk element being axially slidable with respect to said shaft, an indentation on the rear face of the valve body element, a shoulder moving with said valve disk element, said shoulder being adapted to be positioned in the indentation to hold the shaft against rotation with respect to the valve body element, and resilient means hearing on the rear face of the valve disk element ;to hold the indentation and shoulder, when in alignment, in engagement, and to hold the seat faces of said elements in contact.

BEST PRATT.

GEORGE F. WEINREICH. 

